psychotherapist psy·cho·ther·a·pist (sī'kō-thěr'ə-pĭst)n. A person, usually a psychiatrist or clinical psychologist, professionally trained to practice psychotherapy.

psychotherapy psy·cho·ther·a·py (sī'kō-thěr'ə-pē)n. The treatment of mental and emotional disorders through the use of psychological techniques designed to encourage communication of conflicts and insight into problems, with the goal being personality growth and behavior modification. Also called psychotherapeutics.